Ultrafast Dynamics of Energetic Materials

Ultrafast Dynamics of Nanotechnology Energetic Materials

MRS Proceedings ◽

10.1557/proc-0896-h03-01 ◽

2005 ◽

Vol 896 ◽

Cited By ~ 1

Author(s):

Hyunung Yu ◽

Selezion A. Hambir ◽

Dana D. Dlott

Keyword(s):

Chemical Reaction ◽

Energetic Materials ◽

Atomistic Simulation ◽

Reaction Dynamics ◽

Ultrafast Dynamics ◽

Simulation Methods ◽

Length Scales ◽

Al Nanoparticles ◽

Explosive Performance ◽

Chemical Reaction Dynamics

AbstractOur work involves understanding the chemical reaction dynamics of nanotechnology energetic materials on the time and length scales of individual molecules or nanoparticles. These types of measurements provide insights into fundamental mechanisms and make a close connection to modern atomistic simulation methods. We are especially interested in the relationships between performance and nanostructure. We have developed a number of diagnostic instruments in our laboratory that can be used to probe chemical reaction dynamics, reaction propagation over short length scales, and explosive performance. Some recent results on energetic materials containing Al nanoparticles and either nitrocellulose (NC) or Teflon oxidizers are presented.

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Ultrafast Dynamics of Shock Waves and Shocked Energetic Materials

MRS Proceedings ◽

10.1557/proc-418-337 ◽

1995 ◽

Vol 418 ◽

Cited By ~ 1

Author(s):

David E. Hare ◽

I-Y. Sandy Lee ◽

Jeffrey R. Hill ◽

Jens Franken ◽

Honoh Suzuki ◽

...

Keyword(s):

Shock Waves ◽

Spatial Resolution ◽

Temporal Resolution ◽

Energetic Materials ◽

Energetic Material ◽

Picosecond Laser ◽

High Temporal Resolution ◽

Ultrafast Dynamics ◽

Coherent Raman ◽

First Time

AbstractExperimental measurements of material effects induced by the passage of sharp shock fronts require techniques which provide high temporal resolution and high spatial resolution. Since typical shock velocities are a few microns per nanosecond, sub-nanosecond probing requires sub-micron spatial resolution. In our experiments, the required temporal resolution is furnished using picosecond laser generated shock waves and picosecond spectroscopy. The spatial resolution is furnished by engineering nanometer scale structures into our shock target arrays. In one technique, absorption transients in the spectrum of a thin layer of molecules, termed an optical nanogauge, are investigated. Shock-induced molecular energy transfer processes are observed in condensed matter for the first time. In a second technique, sub-micron particles of an energetic material are shocked and probed using ps coherent Raman spectroscopy. This probing technique permits the instantaneous measurement of the temperature, pressure and composition of an energetic material under dynamic shock loading.

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